L.S.
I solved this with a trick taken from my sister. Kids like to do stuff and help out and not be left out so I clip the nail almost all the way but leave a tiny bit attached and then tell my son to help me. He loves pulling the nail competely off. The first time I did this he was a little over a year and I told him he could help me. I first had to show him that I was going to leave the nail for him to pull off, but it has worked every time and it worked for my sisters two boys. They just like to be involved and for some reason it fascinates them. Good luck!